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d�Z'iZ(Zdd�Z)e)eed�<e)eee�<e)eee�<e)ee<e)ee<e)ee<e)ee<e)ee<e)ee<e)eej*<e)ee<e)eej<e)eej<e)eej <e)ee<e'fdd�Z+e+ee#<e'fdd�Z,e,ee<e'fdd�Z-e-ee$<e	du�re-ee	<dd�Z.e.eej/<[dd�Z0ddde'fdd�Z1[[[	dS)a�Generic (shallow and deep) copying operations.

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        x = copy.copy(y)        # make a shallow copy of y
        x = copy.deepcopy(y)    # make a deep copy of y

For module specific errors, copy.Error is raised.

The difference between shallow and deep copying is only relevant for
compound objects (objects that contain other objects, like lists or
class instances).

- A shallow copy constructs a new compound object and then (to the
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- A deep copy constructs a new compound object and then, recursively,
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Two problems often exist with deep copy operations that don't exist
with shallow copy operations:

 a) recursive objects (compound objects that, directly or indirectly,
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 b) because deep copy copies *everything* it may copy too much, e.g.
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Python's deep copy operation avoids these problems by:

 a) keeping a table of objects already copied during the current
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This version does not copy types like module, class, function, method,
nor stack trace, stack frame, nor file, socket, window, nor any
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Classes can use the same interfaces to control copying that they use
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